Gas-analysis apparatus



W. L; DE BAUFRE.

GAS ANALYSIS APPARATUS.

APPLICA TION FILED OCT-101 1919.

WITNESS: I N VEN TOR:

Cir

UNITED STATES PATENT OFFICE.

WILLIAM L. DE BA'UFRE, O1? HIGHLAND PARK, MICHIGAN.

GAS-ANALYSIS APPARATUS.

Specification of Letters Patent. Patented July 12, 1921 Application filed October 10, 1919. Serial No. 329,691.

for its object to withdraw automatically samples of equal volume and pressure from the source to be analyzed.

A further object of my invention is to automatically maintain at their proper levels, the several liquid seals required in the instrument. I

With these and other objects in view, my invention consists of the novel construction, combination and arrangement of parts as hereinafter.specifically described and illustrated in the drawings, wherein is shown the preferred embodiment of my invention, but it is understood that changes can be resorted to which come within the scope of the claims hereunto appended.

The figure is a front elevation, partly in section, of the herein described embodiment of my invention.

The gas analysis apparatus is operated by liquid supplied continuously to tank 2. As soon as the water overflows the bend of siphon 4, it discharges rapidly from tank 2 until the siphoning effect is broken by air entering the siphon within tank 2. Float 3 rises and falls with the water level.

Chain 5 running over pulleys 6 and T is attached to float 3 at one end and to extractor bell S at the other end, so that extractor bell S rises and falls in the liquid seal in tank 9 alternately with float 3 in vessel 2. As extractor bell 8 falls, the gas mixture previously drawn in during the up stroke is forced out through flexible tube 10 and pipe 11 into vessel 12, where it bubbles through the liquid absorbent reagent therein. The gas constituent to be measured is absorbed by this reagent. The remaining gas is discharged through pipe 13.

While extractor bell 8 is in its uppermost position, the gas in vessel 12 is at atmospheric pressure by reason of the lower end of tube 1% being abovethe surface of the liquid seal in tank 9. As extractor bell 8 descends, the

water or other through pipe 1 gas remaining after bubbling through the reagent in vessel 12 is at first discharged to the atmosphere through pipes 13 and 15, flexible connection 16 and tube 1.4:. hen the lower end of tube 1% penetrates the surface of the liquid seal in tank 9, the residual gas then flows through pipe 17 to measuring bell 18, which rises in the liquid seal in tank 19 in proportion to the volume of the residual gas. The weight of the recorder bell 18 is counter-balanced by weight 22attached to cord 20 passing over pulley 21. The percentage of residual gas or of the constituent removed by absorption in vessel 12 is indicated on scale 23' by the highest position reached by recorder bell 18. Any well known method of recording the highest position reached by bell 18 may be used to obtain a permanent record.

lVhen extractor bell 8 ascends, the gas in the recorder bell 18 remains entrapped until the lower end of tube 1 1 passesout of the liquid seal in tank 9 During the upward motion, a fresh sample of gas mixture is drawn into extractor bell 8 through pipe 221-, bubbling through liquid seal in valve 25, the lower end of tube 11 being sealed by the liquid reagent in vessel 12.

When the water in vessel 2 reaches the highest point, a smallamount of it trickles through tube 26 and drops into the left hand compartment of vessel 27, which is connected by tube 28 to valve 25. The overflow edge of partition 29 determines the level of the liquid seal in valve 25, the excess water or other liquid draining into the middle compartment. The middle compartment of vessel 27 is connected by tube 30 to tank 9, the level of the liquid seal therein beingdetermined by the upper edge of partition 31 over which the excess liquid runs into the right-hand compartment. Tube 32 joins the right-hand compartment of vessel 27 with tank 19, the level of the liquid seal in the latter being determined by the height of the upper edge of drain tube 33.

The absorption of a constituent of the gas mixture by the liquid reagent in vessel 12 augments the volume of the reagent. To eliminate the error consequent upon a change in volume of the gas space above the reagent,

tube 3 1 is arranged to extend near the bottom of vessel 12 to be sealed by the liquid reagent. therein, and project externally at about the height it is desired to maintain the surface o the liquid reagent. The excess reagent dropconnected to the said extractor bell and to a' venting device constituted by an opentube attached to the said extractor bell also dipping'into a liquid seal, meansfor subjecting the gas mixture to the action of an ab-' sorbcnt reagent during its passage from the extractor bell to the measuring bell, and means of bringing the said liquid seals to their normal levels during each cycle of operations. I I I 2. In a gas analysis apparatus, a liquid 7 seal, an extractor bell fitted to rise and fall in ,saidliquidseal 'and connected with the source of the gas mixture to be analyzed, a second liquid seal, a measuring bell fitted to rise and fall in the second liquid seal and v connectedvto thesaid extractor bell and to aventingdevice constituted by an open tube attached to the said extractor bell also dipping into a liquid seal, means for subjecting the gas mixture to the action of an absorbent reagent during its passage from the extractor bell to the measuring bell, and means of bringing the said liquid seals to their normal levels during each cycle of operations comprising a plurality of chambers connected to said liquid seals, automatic means of supplying each chamber with a small quantity of liquid and automatic means of discharging the excess liquid.

3, In a gas analysis, apparatus, a liquid sea l," an extractor bell fitted to rise and'fall said liquid seal and connected with the source ofthe gas mixture to be analyzed, a second liquid seal, a measuring bell fitted to rise and fall in the second" liquid seal andconnected to the said extractor bell and to a venting. device constituted by an open tube attached to the said extractor bell also dipping into a liquid seal, means of subjecting the gas mixture to the action of an absorbent reagent during its passage from the extractor bell to the measuring bell, and means of automatically discharging the excess reae gent as its volume is increased absorp tion of a portion of the gas mixture.

4. In a gas analysis apparatus, a liquid seal, an extractor bell fitted to rise and fall in sa d liquid seal andconnected through a non-return valve having a second liquid seal to the source of the gas mixture to be analyzed, a third liquid 'seaL-a measuring bell fitted to rise and tall in the third vliquid seal and connected to the said extractor bell and to a venting deviceconstituted by an open tube attached to the said extractor bell also dipping into a liquid seal, means of subjectingthe gas mixture to the" action of; an absorbent reagent during its passage from the extractorbell to the measuring bell, and means of bringing the said liquid seals to their normal levels during each cycle" a liquid said extractor bell to rise and fall automati-.

cally comprising a vessel fed by a liquid, :1 siphon for emptying the vesseloi' thev liquid at intervalsand a float adapted to rise. and fall with the liquid, means for suban extractor bell fitted" to rise and fall 7 absorbent reagent during its passage from i the extractor bell to the ineasuringbell,and

means of bringing the said liquid sealsto e Flinn Mccttma, ROBERT P. Hoornn'.

jecting the gas mixture to the actionof an 

